Wrench



Nirnn Staes JAMES H. BROVN, OFA EVANSTON, ILLINOIS.

WRENCH.

SPECIFICATION formingpart of Letters Patent No. 451,023, dated .April28, 1891.

Application filed November 19, 1890. Serial No. 371.919. (No model.)

To all whom it may concern.-

Be it known that I, JAMES H. BROWN, a citizen of the United States,residing at Evanston, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Vrenches; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which1o it appertains to make and use the same, refer.- ence being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

In my invention the object has been to se- I 5 cure a small and lightwrench of great strength and quick adj ustability for use upon bicycles,although my invention may be used in the manufacture of wrenches ofevery size andof any suitable material. I attain this object 2O by themechanism illustrated in the accompanying drawings, in which- Figure lis a plan view. Fig. 2 is a horizontal sectional view. Fig. 3 is across-section on line 3 3 of Fig. l, showing the slotted screw andmovable jaw and showing also a tooth of the rack engaging with thegrooved slot. Fig. 4 shows the movable jaw as stamped from the sheet ofsteel or other metal and before it is closed around the body-piece ofthe 3o wrench and upon itself. Fig. 5 is a sectional view on line 5 5 ofFig. a at the widest part of Fig. et.

A is the body-piece or handle of the wrench a, a slot or mortise in thesame; and B, the

3 5 movable jaw, also slotted or mortised, as at b.

C is the screw, having a channel c through its threads in a directionparallel with the plane of its axis.

d is the journal of the revolving screw C.

the slot in the handle or body-piece A.

F is a spur of the strip of steel forming the envelopingzsheath orsliding jaw which may be used to give the jaw greater strength byforming a dovetail joint with the other wing of the strip used to formthe jaw B.

G is a supporting-piece which may be inserted and held by the samerivets g which hold the wings that form the sliding jaw to- 5o gether;but the wrench may be manufactured without the use of thesupporting-,piece G or the dovetail joint. f'

`tion cumbrous.

E is the toothed rack upon the margin of Similarlet-ters refer tosimilar parts throughout the several views.

One advantage of my wrench is that it may be more cheaply made than theordinary wrench with a sliding jaw and at the same time be lighter, moreeasily made, and more rapidly'adj usted.

In wrenches having sliding jaws as heretofore constructed it has beennecessary for the sliding jaw of the wrench to be made large enough fora thread to be cut therein, in which a screw is moved to adj ust thesliding jaw, said screw being usually not less than five-sixteeuths orthree-eighths of an inch in diameter, and thus rendering the construc-By my form of construction I accomplish the vsame result by cutting asection of a thread in the margin of the slot, and a wrench is producedhaving greater cheapness in construction, weighing less, and havinggreater ease and facility of adjustment than other forms. I cut the mainparts of the wrench from sheet-steel, that for the bodypiece or handle Abeing, preferably, about one-sixteenth of an inch in thickness and thatfor the jaw B about one thirty-second of an inch in thickness for awrench six inches in length, though steel of a different thickness maybe used, and the gage of the steel used should conform to the requiredstrength of the wrench. I thus produce a wrench of great strength, whichis at the same time very light and easily made and whencompleted neednot be more than about an eighth or three-sixteenths of an inch inthickness at its thickest part for a wrench having a length of six orseven inches. Like the handle A, the sliding jaw B may be cut from asingle piece of steel, and at the point where the two wings of the metalcome together to form the forward part of the jaw B they maybestrengthcned by a supporting-piece G or by the dovetail joint shown inthe drawings, or by both, or the wings may be fastened in any suitablemanner.

My present invention is an improvement on that embraced in my formerapplication for a patent in wrenches, filed September 22, 1890, SerialNo. 365,366, and shows an improved mechanism for adjusting the jaws ofthe wrench. I employ a threaded screw for this purpose, which may bejournaled loosely in IOO the open spaces of the movable jaw and may havebearings on the inner walls thereof. The walls of the slot of themovable jaw serve to retain the screw from moving sidewise. In thisconstruction the screw, while held with great firmness and rigidity asto its location within the slots, has but few frictional points, and isoperated with greater ease by reason thereof. Only the tops and bottomsof the journal touch a bearing, and the screw is sesecured sidewise bythe edges of the threads touching the walls of the slot and the rack;but this rack, as well as the walls of the slot, being of quite thinmaterial, only a small part of the screw in its rotation is at anyonetime in engagement or touch with them, or either of them, and theminimum of friction is secured, and this is an important feature inwrench construction and operation.

Vhat I claim, therefore, as my invention, and desire to secure byLetters Patent, is

l. In a wrench having a recessed handle with a toothed rack upon oneedge of the recess and a recessed sliding jaw moving upon said handle, athreaded screw journaled and operating within the sliding jaw andengaging the toothed rack to move the sliding jaw, substantially asshown and described.

2. In a wrench having a recessed handle with a toothed rack upon oneedge of the recess and a recessed sliding jaw moving upon saidhandle, athreaded screw7 journaled and operating within the sliding jaw andengaging the toothed rack to move the sliding jaw, said screw having itsthreads channeled to admit of a quick adjustment of the jaw,substantially as shown and described.

3. In awrench, a recessed sliding jawbearing within its recess, and athreaded screw adapted to engage with a rack to move the jaw upon thebody or handle of the wrench, substantially as shown and described.

4. In a wrench, a recessed sliding jaw, a

threaded screw operating within the recess to move the jaw, and achannel through the threads of the screw to allow quick adj ustm ent ofthe jaw, substantially as shown and described.

5. In a wrench, a recessed body-piece or handle, a recessed sliding jaw,and athreaded screw operating within the recessed parts and serving tolimit the play of the sliding jaw by striking against the bottom of therecess, substantially as shown.

6. In a wrench, the combination of a recessed body-piece or handle A, arecessed sliding jaw B, and a threaded screw C, substantially asdescribed, and for the purpose speciied.

7. In a wrench, the combination of a recessed body-piece or handle A, arecessed sliding jaw B, and a threaded screw C, having a channel c,substantially as described, and for the purpose specified.

8. In a wrench with an adjustable jaw, a threaded screw having a groovechanneled through its threads in a line parallel with its axis to allowquick adjustment of the jaws, substantially as shown and described.

O. In a wrench with adjustable jaws and a rack upon one of the jaws, agrooved screw adapted to engage the rack to adjust the wrench and at itsgrooved point to slide freely over the rack, substantially as shown, andfor the purpose specified.

l0. In a wrench the jaws of which are made of strips of sheet metal, theconstruction of a recessed body-piece or handle, a recessed sliding jaw,and a threaded screw, substantially as shown and described.

ll. In a wrench the jaws of which are made of strips of sheet metal, theconstruction of a recessed body-piece or handle, a recessed sliding jaw,and a channeled screw to allow quick adjustment of the jaws,substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES ll. BROXVN.

Witnesses:

A. C. CAMPBELL, BURR JENKs.

